他们在沙海种下绿色未来

Core Viewpoint - The "Three-North" project aims to combat desertification and enhance ecological security in northern China, with significant progress made in the past two years, including the implementation of 415 projects covering 1.64 million acres, marking the most substantial investment and completion in the project's history [6][7][8]. Group 1: Project Implementation and Achievements - The "Three-North" project has completed 415 projects and achieved a construction task of 1.64 million acres in the last two years [6]. - This period is noted for the highest investment and completion rates in the history of the "Three-North" project [6]. - The project focuses on ecological restoration, particularly through the cultivation of drought-resistant tree species like Populus euphratica (Hu Yang) [7][8]. Group 2: Research and Development - The research team led by Professor Li Zhijun has developed successful techniques for the cultivation and transplantation of Hu Yang seedlings, achieving a survival rate of over 99% [9]. - The team has collected over 4,000 samples of Hu Yang genetic resources and established a database for conservation and research purposes [8][9]. - Advanced techniques in seedling management have reduced the time for Hu Yang seedlings to grow to transplantable size from 2-3 years to just 4 months [9]. Group 3: Local Initiatives and Innovations - In Inner Mongolia, the "deep planting and shallow burying" technique has increased seedling survival rates from 50% to 90%, while also reducing water usage by over 50% [11][12]. - The integration of economic tree species like Larix gmelinii and Pinus sylvestris has been explored to enhance both ecological and economic benefits in desertified areas [12]. - The transformation of barren land into productive orchards, as demonstrated by Zhang Binggui in Shaanxi, showcases the potential for agricultural development in previously unproductive areas [16][18].